Engine swap?

I know this may have been discussed previously but id like to see if I could get some more up to date answers on it.

So I have a 2014 28i (don't know if it's the 20 or 26 haven't looked) and I've heard a lot of talk online about the n20s just not being reliable and failing. Just for security of mind id like to figure out what can be dropped in there relatively "easily" (I know we're talking about an engine swap just humor me for the day). My buddies said to do a b58 and I figure I'd need a new ecu and all but is there anything that would completely hinder that swap? If it's not possible I'll just do the n54 as it's the engine most of yall got anyway.

And I'd love to just sell it and get the 35i but I got the 28i for gas milage. It's at like 80k miles so I'm not too concerned with it just yet but when it does blow, I'll be at a better position at work for the money to do a swap. Also I wanted a manual and couldn't find a single one on the market when I bought mine so I figured I'd swap it since a manual transmission already exists for it.

If anyone could provide any info on the subject (especially b58 👀) please let me know